--オプション
--Gradius' Option
--scripted by YoshiDuels
local s,id=GetID()
function s.initial_effect(c)
	--Gain ATK
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDiscardDeckAsCost(tp,1) end
end
function s.filter(c)
	return c:IsFaceup() and c:IsRace(RACE_MACHINE) and c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsLevel(4) and c:GetBaseDefense()==800 and c:GetBaseAttack()>0 and not c:IsMaximumModeSide()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_MZONE,0,1,nil) end
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	--Requirement
	if Duel.DiscardDeck(tp,1,REASON_COST)<1 then return end
	--Effect
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	local sg=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.HintSelection(sg)
	local atk=sg:GetFirst():GetBaseAttack()	
	--Increase ATK
	local c=e:GetHandler()
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(atk)
	e1:SetReset(RESETS_STANDARD_PHASE_END,2)
	c:RegisterEffect(e1)
end